# $Id: packInstall.sh.template 3937 2017-03-20 15:38:05Z pierre $
# function for packing and installing a tree. We only have access
# to variables PKGDIR and PKG_DEST
# Other variables can be passed on the command line, or in the environment

packInstall() {

# A proposed implementation for versions and package names.
local PCKGVRS=$(basename $PKGDIR)
local TGTPKG=$(basename $PKG_DEST)
local PACKAGE=$(echo ${TGTPKG} | sed 's/^[0-9]\{3\}-//' |
           sed 's/^[0-9]\{1\}-//')
# version is only accessible from PKGDIR name. Since the format of the
# name is not normalized, several hacks are necessary...
case $PCKGVRS in
  expect*|tcl*) local VERSION=$(echo $PCKGVRS | sed 's/^[^0-9]*//') ;;
  vim*|unzip*) local VERSION=$(echo $PCKGVRS | sed 's/^[^0-9]*\([0-9]\)\([0-9]\)/\1.\2/') ;;
  tidy*) local VERSION=$(echo $PCKGVRS | sed 's/^[^0-9]*\([0-9]*\)/\1cvs/') ;;
  docbook-xml) local VERSION=4.5 ;;
  *) local VERSION=$(echo ${PCKGVRS} | sed 's/^.*[-_]\([0-9]\)/\1/' |
                   sed 's/_/./g');;
# the last sed above is because some package managers do not want a '_'
# in version.
esac
local ARCHIVE_NAME=$(dirname ${PKGDIR})/${PACKAGE}_${VERSION}.deb
case $(uname -m) in
  x86_64) local ARCH=amd64 ;;
  *) local ARCH=i386 ;;
esac

pushd $PKG_DEST
rm -fv ./usr/share/info/dir  # recommended since this directory is already there
                             # on the system
# The next lines are specific to dpkg, but usually all package managers
# need some information on the version and the package. 
mkdir DEBIAN
cat > DEBIAN/control <<EOF
Package: $PACKAGE
Version: $VERSION
Maintainer: Pierre Labastie <lnimbus@club-internet.fr>
Description: $PACKAGE
Architecture: $ARCH
EOF
# Building the binary package
dpkg-deb -b . $ARCHIVE_NAME
# Installing it on LFS
dpkg -i $ARCHIVE_NAME
# Storing the package (recommended).
mv -v $ARCHIVE_NAME /var/lib/packages
popd                         # Since the $PKG_DEST directory is destroyed
                             # immediately after the return of the function,
                             # getting back to $PKGDIR is important...
}
